`delete_all()` incorrectly calls `reset()`, deleting memories of all users instead of filtered ones

[nooooonee]

🐛 Describe the bug

The Memory.delete_all() method has a critical bug where it calls self.vector_store.reset()（https://github.com/mem0ai/mem0/blob/dba7f0458aeb50aa7078d36eaefa2405afbee620/mem0/memory/main.py#L1053C9-L1053C34） after deleting filtered memories. This causes the entire vector store collection to be dropped and recreated, deleting all memories for all users, not just the ones matching the provided filters.

[nooooonee]

Reopening this issue; PR has been submitted, will close once merged.

[parthmahajan008]

@deshraj @whysosaket @parthshr370 , still waiting for the PR merge
Tagging you too, @taranjeet , keeping you in the loop.